[vtkusers] VOI Extraction

[Brian Rowe]

On Apr 22, 2004, at 8:51 AM, Amy Henderson wrote:

> Hi Brian,
>
> The parameters you pass to SetDataVOI should be the minimum and 
> maximum pixel value in each dimension, not the minimum and an offset. 
> The example you listed would then be:
> reader->SetDataVOI(x_start, x_end, y_start, y_end, z_start, z_end);
> where: x_start == 568, x_end == 1292,
>          y_start == 258, y_end == 967,
>          z_start == 1141, z_end == 1159
>
> - Amy
>

ok, I tried that and the attatchment is the result.  It's quite similar 
to my previous results.

Here is the code that generated that (the ImageReader part only).

         self.reader = vtkImageReader()
         self.reader.SetDataScalarTypeToUnsignedChar()
         self.reader.SetFilePrefix(prefix)
         self.reader.SetFilePattern(pattern)
         self.reader.SetNumberOfScalarComponents(3)
         self.reader.SetFileNameSliceOffset(1)

         self.reader.SetDataExtent(0, 2048-1,
                                   0, 1216-1,
                                   zrange[0], zrange[1])
         self.reader.FileLowerLeftOff()

         self.reader.SetDataVOI(xrange[0], xrange[1],
                                yrange[0], yrange[1],
                                zrange[0], zrange[1])

Any thoughts would be appreciated.
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